The reason it is healthy is becuz it has photosynthesis in it, which does not only help animals, but every living thing.
The plants from long ago are like animals of long ago in a couple of ways. Both have survived through time.
humans
No. Green plants were on the planet, long before there were people. Green plants need carbon dioxide, water, sunlight, soil, and seeds to live. They do not need people.
The phosphorus cycle is long and slow, but it is an important part of the environment. It helps plants grow, and is used by farmers to fertilize them. When animals eat the plants, they absorb phosphates.
your mum o'clock
Well, most of the time geologists find fossils of plants and animals, and then study them to find out how long ago the plant(or animal) lived.
Seed plants carry out long distance reproduction by animals, rain, wind, or pollen.
Seed plants carry out long distance reproduction by animals, rain, wind, or pollen.
A long time ago
fossils
Seed plants carry out long distance reproduction by animals, rain, wind, or pollen.
Depending on how long you are traveling, plants require relatively little care or expense. If it's a short trip, like just a few hours drive, just make sure it doesn't get squashed or fall over. Animals, on the other hand, require food, water, and potty breaks. If you are talking about long distance travels, it'd be best to look up an airline's policy on pets and cargo.